After having tried the three bins in question I would suggest either the Monarchs or the Cascades over the Pentax. If you consider the Pentax SP series in the group then I would opt for them over the Monarchs or Cascades but the HR II really did not appeal to me optically or physically.

To further split hairs the Cascades weren't as good as the Monarchs optically until last year when phase coating was added to their design. Now they are in the same optical class in my opinion. However, I could be wrong but I believe the field of view is considerably narrower on the Cascades.

As for the Discoverers, excellent bins. Nks is correct. They are a step above the others here optically. The Discoverers utilize silver coated roof prisms which greatly help enhance both brightness and clarity. They are also of the 7x42 configuration which increases several key optical factors: depth of field, field of view and brightness level in low light conditions.

Their only negatives? They are a bit heavier than the other glasses mentioned here and they are now discontinued from the Bushnell lineup. They are being replaced by the new open bridge Infinitis and possibly the new Elite E2 line.

Nk,

It is nice to see you posting about the discoverers here too.

Frank